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==Positions of geologic bodies==

==Positions of geologic bodies==

Gravity is particularly good at locating horizontal positions of geologic bodies that have a different density than the surrounding rock—ore bodies or salt-cored bodies, for example.

Gravity is particularly good at locating horizontal positions of geologic bodies that have a different density than the surrounding rock—ore bodies or salt-cored bodies, for example.

==Interpreting fault location==

==Interpreting fault location==

Faults usually can be identified through either steep gradients or truncation of trends.

Faults usually can be identified through either steep gradients or truncation of trends.

The figure below contains two Bouguer gravity maps of Southern California, showing the expression of faults. In the left map, locations ''a'' and ''b'' show strong gradients, which indicate faults. A series of truncated trends (dashed) near location c also indicate faults. The right map shows the actual location of the major faults over the same gravity map.

The figure below contains two Bouguer gravity maps of Southern California, showing the expression of faults. In the left map, locations ''a'' and ''b'' show strong gradients, which indicate faults. A series of truncated trends (dashed) near location c also indicate faults. [[:file:applying-gravity-in-petroleum-exploration_fig15-3.png|Figure 1]] shows the actual location of the major faults over the same gravity map.

 

[[file:applying-gravity-in-petroleum-exploration_fig15-3.png|thumb|{{figure number|15-3}}]]

==See also==

==See also==